RCT: In children with peanut allergy, initiation of peanut oral immunotherapy before age 4 years induced desensitization in 71% of patients and remission in 21%.

Efficacy and safety of oral immunotherapy in children aged 1–3 years with peanut allergy (the Immune Tolerance Network IMPACT trial): a randomised placebo-controlled study – The Lancet (link to abstract – $ for full-text)

News Release: Oral immunotherapy induces remission of peanut allergy in some young children – NIH News Releases

Commentary: Peanut Oral Immunotherapy at Younger Age Ups Desensitization in Children – HealthDay